3978207 Flywheel Housing | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta flywheel housing from the engine group, weighing 19.00 kg and listed for 8 applications across TWD, TID, TD and TAD series engines. It supersedes part number 20411870, the same old number also shown as superseded by the rubber plug 3978205, so confirm which part you need. It is roughly half the weight of the other flywheel housing in this group, 3978074, at 40.50 kg.

🚤 Compatibility

Typically suits:

• Volvo Penta TWD710V
• Volvo Penta TWD731VE
• Volvo Penta TWD740VE
• Volvo Penta TID71A
• Volvo Penta TD730VE
• Volvo Penta TD71A
• Volvo Penta TD640VE
• Volvo Penta TAD730V

• Engine Family: TWD, TID, TD, TAD

⚙️ Key Features

• 19.00 kg casting
• 8 applications across TWD, TID, TD and TAD series engines
• Supersedes 20411870, an old number also claimed by rubber plug 3978205
• Around half the weight of flywheel housing 3978074
• Also supersedes Volvo part number 3826500

🔌 Function

Encloses the flywheel and provides the machined face and register that the gearbox or transmission bolts to.

⚠️ Common Signs of Failure

• Oil leak tracking from the housing joint or the rear main area
• Cracks around a mounting boss or a bolt hole
• Register face worn so the gearbox sits out of true
• Bolt threads pulled in the casting
• Vibration or knocking from misalignment at the drive coupling

🛠️ Service Notes

• The same superseded number is shown against the rubber plug 3978205, so confirm you are ordering the housing you need
• At 19.00 kg use mechanical lifting and expect it to travel as a freight item
• Renew the rear main seal and gaskets while the housing is off and check alignment on assembly

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 3978207 → Supersedes 20411870

OEM / Related Numbers

• 3826499 referenced in the part notes

📦 Condition

• Genuine Volvo Penta part
• Brand new
• Supplied in original or equivalent packaging